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Cessna 172 airspeed input

PostPosted: Fri Nov 23, 2007 5:37 am
by jakob
Hi, I know how to fly a Boeing 737 and a few others. I seem to have little problem with the cessna 172 and 182. After one gets goin, they are pretty simple to fly. My question is:How does one enter the Kias? I seem to have a problem with getting this. I know how to enter the climb speed but where do you enter your flght airspeed? I hope I don't sound "stupid". Thank  you, jakob

Re: Cessna 172 airspeed input

PostPosted: Fri Nov 23, 2007 7:05 am
by commoner
Hi Jakob......In small airplanes, such as the Cessna 172 as far as I know, the autopilot does not have access to the throttles so you will have to control the speed manually I guess.........sorry no having a having a kip for an hour here :( ........commoner ;)

Re: Cessna 172 airspeed input

PostPosted: Fri Nov 23, 2007 1:56 pm
by RAFAIR100
I don't recommend it Jacob but, if you get really desperate, go into the Cessna .cfg file.     In the 'autopilot' section, under ' autothrottle available', change the '0' to a '1' and save.     As I remember, the Cessna has no provision for speed setting on the autopilot panel so you will have to download and install an autopilot with this facility.

Re: Cessna 172 airspeed input

PostPosted: Fri Nov 23, 2007 2:49 pm
by TSC.
they are pretty simple to fly.

You answered your own question there jakob, you don't need autothrottles, the 172's & 182's are so easy to fly that you can adjust to your desired speed manually in no time at all - who needs an AP? Switch it off, you'll have more fun without it.

:)

TSC.

Re: Cessna 172 airspeed input

PostPosted: Fri Nov 23, 2007 8:24 pm
by beaky
A good 2-axis AP is a wonderful thing in a Cessna single... but in real life you wouldn't use one to set airspeed.
 Best thing to do is set it up manually for straight and level cruise (somewhere in the green arc on the ASI)  then engage the AP to hold heading and altitude.

Re: Cessna 172 airspeed input

PostPosted: Fri Nov 23, 2007 8:26 pm
by garymbuska
Even in the real world small Cessna's and small Pipers have a manual throttle kind of like a old choke lever or the speed control of a lawn mower. Push in and the engine speeds up pull out and the engine slows down just like the gas pedal in your car. Of course you will see one other control right beside the throttle and that is the mixture control unless you have auto mixture turned on you will need to adjust this as you climb in altitude. 8-)

Re: Cessna 172 airspeed input

PostPosted: Sat Nov 24, 2007 1:55 am
by MattNW
I'm so embarrassed to admit this but when it comes to real airplanes I'm an autopilot virgin.  :-[ Back then only those noisy cigar shaped things had an AP everyone else just wished for one. Heck back then we didn't even have wings. We had to stick our arms out the window and flap real hard to get it in the air.  ;D

Re: Cessna 172 airspeed input

PostPosted: Sat Nov 24, 2007 2:24 am
by Sir_Crashalot
But you did have an engine? Or did you have to run very hard like Fred Flintstone?

Crash ;) (yabadabadoooooo)

Re: Cessna 172 airspeed input

PostPosted: Sat Nov 24, 2007 5:58 am
by commoner
Hi Jakob..there's an old saying (well in the UK at least) it says......"where there's a will, there's a way" In other words if you want to do something badly enough it is always achievable.

You can "borrow" the AP from another a/c such as in my pic. the Lear jet AP

copy the   gauge45=Lear_45!Autopilot, 190, 16   into your cessna(?) panel.cfg main panel gauges list and give it the next consecutive number. Then do as RAF says regarding the autothrottle in the aircraft.cfg.

...As you can see it works just fine...the IAS, HDG and ALT settings are all mirrored on the gauges.

............no point asking for silly speeds though but it will hold within the limits of the aircraft's capability.

.......needs to be a bit smaller maybe but it shows what can be done............ just for fun really.

           ...... commoner ;)

              Image

Re: Cessna 172 airspeed input

PostPosted: Sat Nov 24, 2007 7:36 am
by jakob
Thanks gents. Thanks for the tips. Helps me a bunch. jakob

Re: Cessna 172 airspeed input

PostPosted: Sat Nov 24, 2007 8:19 am
by Brett_Henderson
You don't fly light piston airplanes by airspeed. You fly them by power setting  ::)

If it has a fixed prop, that's RPM. If it has a constant speed prop, that's manifold pressure.

A C172 ony has a 10knot cruise window ( 100-110knots @ sea-level ). If you're already using an auto-pilot to hold altitude  ::)  ...  that doesn't leave much throttle adjusting to worry about.

If for some reason you're flying with the throttle wide open, so much for an auto throttle... OR ... need to fly at an airspeed much under 100knots, you had better be flting by hand, anyway.  ;)

Re: Cessna 172 airspeed input

PostPosted: Sat Nov 24, 2007 8:26 am
by Brett_Henderson
AND...  you don't want the throttle to be controlled independent of other things, in a piston engine. If the auto throttle needed to increase power while cruising (lean mixture), while the throttle is already near 100 %..  a transition to full power without richening the mixture is hard on the engine..  and if it 's a constant speed prop.. it's REALLY hard on the engine to increase manifold pressure without increasing the prop RPM...

Re: Cessna 172 airspeed input

PostPosted: Sat Nov 24, 2007 8:32 am
by Fozzer
BLIMEY!.

...here is a Bloke who flies Boeing 747 passenger Cigar Tubes, but hasn't yet obtained his Pilots Licence flying a Cessna 152 Trainer... :o...!

Good grief... :o...!

I just hope he is not "Pilot In Command" of my next flight to the Seychelles... :'(...!

F....G-BPLF... 8-)...!

The way to go: Cessna 150 Trainer>>>>>Boeing 777 Air Polluter...trust me...;)...!

.... ;D...!

Re: Cessna 172 airspeed input

PostPosted: Sat Nov 24, 2007 9:36 am
by jakob
Hi, Yep I can fly a 737 plus some others. I can fly a cessna but I just had a problem with the speed. With the larger jets, to me it is somewhat easier because most of aircraft settings
are manually typed in, (Fmc)  and so forth. I went in after reading these posts, changed couple of things. I fired up the 172 took a flight out round Nihau (beautiful) for bout 2hours. It was a perfect flight.
This is for the gent named "F". I'll fly you anywhere  :) you want to go sure nough with no problem. Oh, I do have a Cessna 150. Nice . I'll fly you to the Seychelles anytime and you won't have water for a landing.
Let's not forget: This is just a game, a simulator game. Let's have some fun! Thanks, jakob ;D ;D

Re: Cessna 172 airspeed input

PostPosted: Sat Nov 24, 2007 10:33 am
by Jayhawk Jake
Hi, Yep I can fly a 737 plus some others. I can fly a cessna but I just had a problem with the speed. With the larger jets, to me it is somewhat easier because most of aircraft settings
are manually typed in, (Fmc)  and so forth. I went in after reading these posts, changed couple of things. I fired up the 172 took a flight out round Nihau (beautiful) for bout 2hours. It was a perfect flight.
This is for the gent named "F". I'll fly you anywhere  :) you want to go sure nough with no problem. Oh, I do have a Cessna 150. Nice . I'll fly you to the Seychelles anytime and you won't have water for a landing.
Let's not forget: This is just a game, a simulator game. Let's have some fun! Thanks, jakob ;D ;D


It's sounds like you can 'operate' a jet, not fly it.  There's a difference.  Being able to fly a plane means knowing how to use it, how to set the power, what to do with it at all stages of flight, with or without instruments.  Operating a jet is quite easy, plug in a bunch of numbers and the plane does all the flying.